Explore software

Tracking A/B test experiments and product analytics

"These experiments are being tracked in PostHog. So, here we track everything, and we can see how everything is running. For AB testing, we use PostHog."

Mauro Botanes

Product analytics tool for validating product-market fit and tracking user behavior

"I use PostHog, no affiliation, as an analytics tool."

Greg Isenberg

Music consumption and discovery

"You both want to listen to your music as easy as if it were Spotify because you both probably use Spotify to rap music. My music consumption happens on Spotify or on YouTube."

Dan Lilienthal

Music discovery through recommendations

"One of the things that I love about Spotify. If I'm listening to something weird, it'll suggest something weird, you know, like that I've never heard of before, bands I've never heard of before, and all a sudden I click on it. The suggestion thing, that's h..."

Joe Rogan

Building simple automations for clients — e.g., auto-duplicating Asana project templates when a new client is added

"This is your simple everyday automation build — your Zapier flows or your make.com flows or your n8n flows. This is ideal for processes where there's a very cut and dry input, a very cut and dry output, usually just one to three steps where a Claude Skill i..."

Corey Ganim

Building automated customer service bots for Shopify stores

"Build a customer service bot which is just a Zapier flow. You pay Zapier 29 or 59 bucks a month for thousands of credits and if a business gets a customer service email into their inbox, Zapier will respond to the email through OpenAI."

Chris Koerner

Video conferencing for client review meetings conducted remotely

"Video conferencing, still Zoom — we use Zoom — but now have Microsoft Teams, which is very different for us."

Wendy Ciehanski

Always-on team coordination channel replacing traditional meetings and project management tools during a 10-week zero-to-one product build

"The only thing that we had was one permazoom. So we had a Zoom meeting that was going 24/7 — people just hop in and out — and Claude Code, lots of Claude Code tokens, and that was it."

Eddie Kim

Cost-efficient task execution in Cursor; near-free Google Sheets creation and general agent tasks

"DeepSeek V4 Flash is probably the most interesting because for certain tasks it is 105 times cheaper than Claude. I highly recommend trying these models. This model is 20 to 100 times cheaper depending on the task."

Riley Brown

AI assistant access while traveling in China

"When I'm in China for two weeks, it's DeepSeek and Gemini. Those are my friends. DeepSeek is intentionally crippled in China. It's not as good as it is here. It can't search the web and it is trained on different data as near as I can tell."

Jason Lemkin

Building niche gaming communities for casual players, particularly dads who want to connect with others

"I'm assuming you haven't heard of the Discord group called Dads of Marathon. There's 13,898 members. It's a Discord group of dads or basically casual gamers who don't have time to play video games, who don't have time to play competitive video games. This D..."

Jonathan Courtney

"We started this with Discord to be honest. Um, you know, we started a Discord community. Like we had the idea in November. We started a Discord, got it to like 10K people"

Albert Brotherton

"With Evernote I want to restrict it to writing to certain notebooks."

Reed Robinson

"Not only do I back them up, but I use other apps as well. I use Evernote. I back them up."

Joe Rogan

Analyzing sales call transcripts and customer conversations

"maybe even look at transcripts and Gong um and tell me all about it. Um it's it's incredible."

Alex Rattray

Demo quality scoring and call analysis

"We score demo quality using AI. We use Gong and you can create like a scoring mechanism for how the call went"

Patrick Forquer

Tracking real-time website visitors and click-through data for OnlyWaivers

"I'm also going to need to add Google Analytics so I can see how many clicks are coming through here. You got to have Google Analytics."

Chris Koerner

Connected to Ploy to generate SEO reports and site optimization suggestions

"I wired this up to Y Combinator's Google Analytics and Google Search Console and pulled in all the data. And what was cool is that right out of the box without me having to do anything other than click through a couple of OAuth flows, it was able to give me..."

Y Combinator

Giving GrokBot agents access to idea documents and Google Docs files

"Having access to Google Drive means it has access to the Google Docs that I've created. A lot of my ideas I throw in Google Docs."

Riley Brown

Connecting Cursor to Google Drive to create and manage Google Sheets, Docs, and Slides via AI agent

"If you come to the top and you just type in Google Drive, you will see this Google Drive setup here. I've already set it up. Once you authenticate it, which just means sign into your Google Drive files, you can then try it in chat."

Riley Brown

Bookkeeping and sending invoices/collecting payments from clients

"My whole tech stack to start was a $100 a month Lovable, $100 a month QuickBooks, Wi-Fi and a computer. That's it. That's all you have to do to start this. You use QuickBooks both for your books and your payments? Yep. That's what I do."

Alex Kirby

Accounting software recommended by bookkeeper

"And it reminds me of two softwares that I paid for as a business, which is Gusto and QuickBooks. I didn't actually just go buy these on the website. My bookkeeper recommended them to me."

Pat Walls

Posting photo stories of day-to-day life with automotive theme to earn view-based revenue

"Snapchat is huge. Snapchat is amazing, dude. I love Snapchat. I post on Snapchat almost like an Instagram story — just take photos, add a caption, my day-to-day life, whatever I'm up to. You get paid based on views just like you would on anything. It takes ..."

TheStradman

"I do TikTok also. I'm on YouTube. I also do Snapchat."

Sophie Rain

Letting users self-book customer discovery and onboarding calls directly from a UI button

"We just used Calendly, opened up our calendar, and let users click that button. It took them straight to the calendar and they just booked a time."

Gaurav

Booking customer calls and meetings

"I just use like Calendly Link. Like I have a horrible funnel, but you can get a lot of bookings just Calendly link, personal website, drive traffic there, create content."

Nick Vasilescu

Hosting AI-built web apps, creating lead magnets, building secure sites with admin dashboards

"They've already added this Sites feature which adds hosting, database storage baked into it, authentication, all of these things are baked into Sites. I can just create a site and it will host it on ChatGPT. You can share it with your team. One of the best ..."

Riley Brown

Publishing the 2D roguelike deck-builder game as a public web page playable by anyone

"I told it to ship this game in ChatGPT Sites. Unlike the 3D games which are in GDAU, this is a 2D game so it's pretty easy to ship to ChatGPT Sites. Once you generate the web page, by default it's only available to people you share with, so you have to hit ..."

Peter Yang

Getting retail items (from Best Buy) delivered faster than driving there yourself

"I recently DoorDashed something from Best Buy and it was an amazing experience because it was faster than me driving to Best Buy and back because they found a local driver who was able to just pick it up. There was like no way that I could ever outperform it."

John Coogan

Last-mile parcel delivery logistics

"It's an interesting story that we use DoorDash for logistics. People don't think about that. DoorDash's quality is better than others, or it's as good as like a FedEx or UPS. But when you use DoorDash and it doesn't get delivered, they're like, 'Why did you..."

Ryan Petersen

Cross-referencing customer information and CRM data

"I'll use like the notion uh HubSpot Gong um MCP servers and then it can cross reference those things in HubSpot"

Alex Rattray

"it has our send grid API, my HubSpot API, my cow.com API"

Cody Schneider

Formalizing and machine-verifying his mathematical and physics work so critics can check it

"I am so excited about the fact that I'm finally going to have something I can talk to, the formalization project. I've been alerted to this by a guy named Jared Lichtman, who's a professor at Stanford... I can translate everything I've done into this progra..."

Eric Weinstein

Formal mathematical problem solving and proof verification

"we take 3,000 formal math problems. So this is just in lean for you can write out the problem statement in this coding language in math"

Luke Grimes

Identifying drug-supplement interaction issues and optimizing personal medication/supplement timing

"I invested in a company called Open Evidence, which is for medical. I used it — I have one supplement I have to take because my iron levels are low and I have to take this one medication. I was taking them at the same time and couldn't understand why I was ..."

Mark Cuban

"Open Evidence is a really good example. Hypocratic is a really good example. Love working with those companies."

Jensen Huang

Image editing with AI model integrations

"I was using Adobe products recently and in Photoshop, they have an integration with Gemini Nano and you can plug in all the different image models and you can actually use the tools in very interesting ways."

John Coogan

"If I could have a workflow where Manis opens every photo individually in Photoshop and tweaks it and does it intelligently and crops it ever so slightly."

Tyler Denk

Centralized data storage for all YC operations

"all of that software sits on one Postgress database that has everything that's important to YC's world in it"

Pete Koomen

"I had it push it into a Postgress database that I on the fly created using the railway API"

Cody Schneider